Portable power station



FIG. 1 is a perspective view of a portable power station of my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken lines in the drawings illustrate portions of the portable power station that form no part of the claimed design. 

CLAIM The ornamental design for a portable power station, as shown and described. 